<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
   <style>
       div{
           width:50px;
           height:50px;
           background-color: aqua;
       }
   </style>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id = 'root'>
        <div @click="handle($event)" >{{msg}}</div>
    </div>
</body>
</html>
<script>
    const vm = new Vue({
        el:'#root',
        data:{
            msg:111, 
        },
        methods:{
           handle(e){
               this.msg = 222;
               console.log(e)
           }
        }
    })
    console.log(vm)
</script>